Theoretical work included: (1) selective absorption of Nsub2Hs ub4 on solids; (2) use of diethanolamine for increasing the Nsub2Hsub4 yield during the decomposition of gaseous NHsub3 in an electric discharge; (3) rate of dissolution of Nsub2sub4 in Hsusb2O; and (4) decomposition of NHsub3 in electric discharges. The following aspects of the study on the formation of Nsub2Hsub4 from NHsub3 in electric discharges are also reviewed: (1) the effect of a beta- emitter in the discharge; (2) the rotating-vane apparatus; and (3) discharges between concentric cylinders. The experimental work in included an investigation of the feasibility of reducing the amount of Nsub2Hsub4 decomposed in the NH sub3 discharge by removing the Nsub2Hsub4 rapidly during the gas phase. A maximum of only 0.05 g of Nsub2Hsub4 per 100 cc of solvent was obtainable in each single pass of the material through the reactor. The introduction of liquid-phase Hsub2O during the formation of Nsub2Hsub4 from NH3 in an electric discharge produced a higher degree of conversion and a greater yield per kilowatt-hour than an anhydrous system.